Add missing PSA_PAKE_CIPHER_SUITE_INIT

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/include/psa/crypto_extra.h b/include/psa/crypto_extra.h
index 76e71bf..79a7dc0 100644
--- a/include/psa/crypto_extra.h
+++ b/include/psa/crypto_extra.h
@@ -1731,6 +1731,11 @@
  */
 #define PSA_PAKE_INPUT_MAX_SIZE 0
 
+/** Returns a suitable initializer for a PAKE cipher suite object of type
+ * psa_pake_cipher_suite_t.
+ */
+#define PSA_PAKE_CIPHER_SUITE_INIT {PSA_ALG_NONE, 0, 0, 0, PSA_ALG_NONE}
+
 struct psa_pake_cipher_suite_s
 {
     psa_algorithm_t algorithm;